

Part number 0509536 is an upper seal retainer used to hold sealing components in place within the pump assembly of compatible sprayers. This retainer ensures proper compression and positioning of seals to prevent fluid leaks. It is compatible with Advantage GPX 165; Advantage GPX 220; SprayTech GPX 165; SprayTech GPX 220; SprayTech; SprayTech LC1600 GPX1600 models. Replacing a worn or damaged retainer restores proper seal function and prevents leakage.
| Part Number | 0509536 |
|---|---|
| Part Description | Upper Seal Retainer |
| Fits | Advantage GPX 165, 220; SprayTech GPX 165, 220; SprayTech; SprayTech LC1600 GPX1600 |
| Condition | New |
The 0509536 upper seal retainer is a precision component that secures and compresses the upper seals within the pump assembly of compatible sprayers. It is designed for use with Advantage GPX 165; Advantage GPX 220; SprayTech GPX 165; SprayTech GPX 220; SprayTech; and SprayTech LC1600 GPX1600 models. The retainer fits over the seal stack, holding the seals in proper alignment against the piston or shaft. This ensures that the seals maintain effective contact, preventing fluid from leaking past the pumping chamber. The retainer is typically made from corrosion-resistant material and is machined to precise tolerances. Over time, retainers can become worn, corroded, or damaged due to constant pressure, chemical exposure, or improper installation. A damaged retainer may allow seals to shift or lose compression, leading to leaks, loss of pressure, and contamination of other pump components. Symptoms of a faulty retainer include visible fluid leaks around the pump rod, decreased spray pressure, or signs of seal extrusion. Replacing a worn retainer with this genuine part restores proper seal positioning and compression. This is often done in conjunction with a full seal kit replacement. Using the correct retainer ensures the longevity and reliability of the pump rebuild.
| Seal retention | Holds seals in correct position |
|---|---|
| Compression control | Maintains proper seal pressure against piston |
| Leak prevention | Ensures seals effectively block fluid bypass |
| Visible leakage | Fluid leaking from pump rod area |
|---|---|
| Corrosion or wear | Retainer pitted, rusted, or deformed |
| Seal failure | Recurring seal issues may indicate retainer damage |
| Pressure loss | Sprayer unable to maintain consistent pressure |
Part number 0509536 is compatible with the following sprayer models. Always verify using your equipment's serial number and parts manual.
| Brand / Series | Specific Models |
|---|---|
| Advantage GPX | 165, 220 |
| SprayTech GPX | 165, 220 |
| SprayTech | LC1600 GPX1600 |
When replacing the upper seal retainer, inspecting these associated components can help ensure a complete repair.
Includes all seals and packings; always replace with retainer.
Check for scoring or wear that could damage new seals.
Inspect lower retainer for wear if servicing upper.